It's worth repeating-as Tom said never reuse old clamps. They are very inexpensive and will ruin your cam(s) if they fall off. Insure the small holes in the tubes above the cam lobes are clear.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT